2006 VZ Exec 3.6L.. radiator cooling fans

[pizz]

I have a question about the two cooling fans on the radiator.
The smaller of the two fans is not working....I checked the fuse....had the relays checked and they are ok...in the end it looked as though the fan motor was shot.....I replaced the smaller fan and motor...started the car and turned on the air con,the larger fan kicked in.... but the smaller fan still was not working....
Do both fans kick in at the same time or the smaller fan kick in as the coolant gets hotter?...I have no idea
I have not checked the heat sensor,nor traced the loop back to the computer? (whatever the proper name for it is)
Any help with this would be much appreciated
Many thanks...

[richardpalinkas]

the larger fan comes on with the air con, the smaller fan being the high speed one kicks in when the coolant temp gets to 109 degrees. one way to test is to earth out pin 86 on the relay, simply get a piece of wire, put it in where pin 86 on the relay is (it will have the relay numbers on the underside of the relay, 30, 85, 86, 87, 87a), push the wire with the relay back in its socket and touch the other end of the wire to earth, or the negative battery terminal.

alternitively, get a scan tool and check all the sensors and actuators, that will show you if everything is working

[lowsv6]

Check if you have power at terminal 30 or 87 on the car if there is get a piece Of wire and bridge out the two out fan should come on, I had this problem couple of weeks ago and it was just a relay.

[pizz]

OK,I will do both today,thank you for the info richardpalinkas and lowsv6.....it gives me some hope of resolving any doubts i have now
CheerZ....pizz

[pizz]

Ok...I have done both tests and all is good,both fans operating ).....thanks heaps for the info guys......this forum is invaluable..
CheerZ